Electrochemical Behavior of Glassy Carbon Electrode Modified by Layer-by-layer Self-assembly of Functional Graphene

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zheng, Lifei^1 ; Zheng, Haitao^1 ; Chu, Wenqiang^1

School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin

300387, China^1

关键词: Electro-active polymers;    Electrochemical behaviors;    Electrochemical response;    Electrode modification;    Film modified electrode;    Glassy carbon electrodes;    Layer by layer self assembly;    Layer-by-layer adsorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022163/pdf
DOI  :  10.1088/1755-1315/170/2/022163

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, an electroactive polymer (PEI-Fc) was prepared by bonding ferrocene groups to the backbone of poly(ethyleneimine). On the other hand, sulfo-group modified graphene oxide (SGO) was also prepared. The multilayer film was constructed on glassy carbon electrode surface by the layer-by-layer adsorption method using PEI-Fc, SGO and PSS.The electorchemical activity of ferrocene in PEI-Fc/PSS or PEI-Fc/SGO film modified electrode was studied, especially the influence of layer number and pH. It is shown clearly that the graphene oxide(GO) has an inhibitory effect of electron transfer. Reduction of graphene oxide(RGO) increases the specific surface area of the glassy carbon electrode, and it is an ideal candidate for electrode modification. It is also found that ferrocene exhibited stronger electrochemical response in PEI-Fc/SGO film compared to the film without SGO. And the response of ferrocene increased with layer number and decrease of pH.